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- W2090132718 abstract "An experimental investigation was conducted to control the amplitude of shock unsteadiness associated with a 24 deg compression-ramp-induced interaction in a Mach 2 flow.Two control configurations in the form of an array of1) 16 90-deg-pitched steady micro-air-jet vortex-generating devices (AJVG1), and 2) eight pairs of 45-deg-pitchedsteady micro-air-jet vortex-generating devices (AJVG2) were studied. EachAJVGdevice was placed upstream of theinteraction region at 12:5� from the compression corner. Both micro-AJVG configurations show a reduction inseparation shock strength and help considerably reduce the height of the lambda-wave triple point with increase inPoj . Pitching the microjets at 45 deg, as in the AJVG2 configuration, prevents a stronger control-generated bow shock to form ahead of the injectors and, hence, reduces the obstruction component of the interaction significantly. A well defined separation line for no control is seen to get replaced by a highly corrugated separation line with control. Significant reduction (up to 67%) in the peak rms value is observed in the intermittent region of separation with AJVG1 for Poj � 208:5 kPa while the same is achieved with AJVG2 at a much higher Poj�>500 kPa�. The spectralcontent of the pressure fluctuations also indicate that, relative to the AJVG2 configuration, AJVG1 is successful inreducing the amplitude of fluctuations in the range of unsteadiness by an order of magnitude as soon as Poj exceeds208.5 kPa. The amplitude of these fluctuations is seen to further decrease with increase in Poj." @default.
- W2090132718 created "2016-06-24" @default.
- W2090132718 creator A5059483255 @default.
- W2090132718 creator A5066770267 @default.
- W2090132718 date "2012-12-01" @default.
- W2090132718 modified "2023-09-25" @default.
- W2090132718 title "Shockwave/Boundary-Layer Interaction Control on a Compression Ramp Using Steady Micro Jets" @default.
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- W2090132718 doi "https://doi.org/10.2514/1.j051577" @default.
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